??6???21?? ?????,???????

???????:???????????,????????????????3.6????????,????????

?,????,?????????????“??????????”??????,????????,?????????????,???????????????,?????????????????????????,???????

????????????????,??“?”,????????????“????????”,??????????????,????,??????????????“??”?????????????????????????????????????“??????????”,???,????,“?????????????”????“?????????”?

???????????????????????,????“???”??????????????????????,?????????,???????????????????,???????????????????“???”?????? ??????????:???? ??“??????”

?? ??????????:??? ????????????

????:1???????:????app

2???????

3??????200??500

4??????????

5?????????

??6???21?? ?????,???????

???????:???????????,????????????????3.6????????,????????

?,????,?????????????“??????????”??????,????????,?????????????,???????????????,?????????????????????????,???????

????????????????,??“?”,????????????“????????”,??????????????,????,??????????????“??”?????????????????????????????????????“??????????”,???,????,“?????????????”????“?????????”?

???????????????????????,????“???”??????????????????????,?????????,???????????????????,???????????????????“???”?????? ??????????:????